JPH0520624A - Magnetic head core - Google Patents

Abstract

PURPOSE:To suppress a winding defect and failure and to improve a yield at the time of passing a hook for operation into a winding window and mechanically and automatically carrying out a winding operation. CONSTITUTION:This magnetic head core is constituted by butting a pair of core halves 1a, 1b consisting of a magnetic material against each other via a magnetic gap G. Winding grooves 4a, 4b provided respectively on a pair of the core halves of the above-mentioned magnetic head core are made asymmetrical with the above-mentioned magnetic gap and the shapes thereof are varied from each other, by which the interference of winding letting-off parts 6a, 6b and the hook 5 for operation is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head core, and more particularly to a magnetic head core formed by abutting a pair of core halves made of a magnetic material via magnetic gears.

[0002]

2. Description of the Related Art As a magnetic head of this type, for example,
There are rotary heads used for VTR (video tape recorder) and DAT (digital audio tape recorder). In such a head, windings are provided to form a magnetic circuit, but it is common to form grooves (winding grooves) on both sides of the magnetic head core to prevent the windings from fraying. is there.

FIG. 7 is a diagram showing a magnetic head core of a conventional magnetic head used for the VTR or DAT. In the figure, 1a and 1b are core halves respectively constituting a magnetic head core, 2 is an adhesive for abutting and adhering the pair of core halves 1a and 1b through a magnetic gear G, and 3 is provided on the core half 1a. Winding window, 4a, 4
Reference numeral b is a winding groove provided on each side surface of the core halves 1a and 1b.

As shown in the drawing, in the conventional magnetic head core, the winding grooves 4a and 4b have the same shape and are formed in the same shape as those of the magnetic gear cup surface so that the winding grooves 4a and 4b can be easily processed. It was provided at a position symmetrical with respect to (the abutting surfaces of the core halves 1a and 1b).

On the other hand, with the recent development of processing technology and assembly technology, in this type of magnetic head, the work of winding the coil around the winding window 3 and the winding grooves 4a, 4b is automatically performed by a machine. Is becoming possible. In particular, a method of performing a winding operation by passing a hook through the winding window 3 is often used because it is inexpensive and has a high yield.

[0006]

However, when the hook 5 is inserted into the winding window 3 as shown in FIG. 8, the windings 6a and 6b extended in the winding grooves 4a and 4b are suspended. Become. However, when the winding work is performed, the feeding portions 6a and 6b of the winding interfere with the hook 5, and in particular, in the winding groove 4a of the core half provided with the winding window 3, a winding failure or a failure occurs. There is a problem that defects easily occur.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a magnetic head core formed by abutting a pair of core halves made of a magnetic material through a magnetic gear. The winding groove provided in the opposite direction is asymmetric with respect to the magnetic gear.

Further, according to the present invention, there is provided a magnetic head core comprising a pair of core halves made of a magnetic material butted against each other via a magnetic gear, wherein the winding grooves provided for the pair of core halves have mutually different shapes. I made them different.

[0009]

With the above-mentioned structure, it is possible to prevent interference between the winding wire and the hook for the winding work during the winding work, and to prevent the failure or failure of the winding.
It has become possible to perform winding with good yield.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the structure of a magnetic head core according to an embodiment of the present invention. In the figure, constituent elements similar to those in FIG. 7 are designated by the same reference numerals, and description thereof will be omitted.

As shown in the figure, in the magnetic head core of this embodiment, the winding groove 4a of the magnetic head core half 1a on the side where the winding window 3 is provided is made smaller than the winding groove 4b of the other core half 1b. . The lower end of the winding groove 4a is located at substantially the same position as the lower end of the winding window 3, and the upper end is located at substantially the same position as the center of the winding window 3.

Specifically, the lower end of the winding groove 4a and the winding window 3
The distance 7 from the lower end of the winding groove 4a is within 0.1 mm, and the distance 7 between the upper end of the winding groove 4a and the center of the winding window 3 is within 0.2 mm. In other words, the winding groove 4
The position of the lower end of a is near the sliding surface of the recording medium (upper side in the figure),
The positions of the upper end of the winding groove 4b and the upper end of the winding groove 4a are substantially the same.

In the magnetic head core having the above-mentioned structure, even when the winding hook 5 is inserted into the winding window 3 and the winding work is performed, the winding portions 6a and 6b of the winding are kept in this state. Since the hooks 5 have a sufficient clearance so that they do not interfere with each other, there is no possibility of winding failure or failure as in the conventional case.

FIG. 3 is a diagram showing the configuration of a magnetic head core of another embodiment of the present invention. In the figure, the same constituent elements as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. The head of FIG. 3 is different from the head of FIG. 1 in that the winding grooves 4a and 4b are cut at the ends thereof perpendicularly to the end faces of the core halves 1a and 1b. Here, the head core shown in FIG. 3 and the head core shown in FIG. 1 have the same dimensions and the arrangements of the respective parts, and their operational effects are exactly the same.

FIGS. 4 to 6 are views showing the structure of a magnetic head core according to another embodiment of the present invention, of which FIG.
Constituent requirements similar to those are denoted by the same reference numerals, and description thereof will be omitted.

The head core of FIG. 4 has a trapezoidal winding groove 4b, which is different from the above-described embodiments. Further, in the head core shown in FIG. 5, the winding grooves 4a and 4b each have an arc shape. Further, the head core of FIG. 6 is an example in which the winding grooves 4a and 4b have different shapes and have special shapes.

Various winding grooves 4 as disclosed in FIGS. 4-6.
Also in the shapes of a and 4b, the same effects as those of the above-described respective embodiments can be obtained as long as the positions of the winding-out portions 6a and 6b of the winding can be maintained at a sufficient distance from the hook inserted in the winding window 3. To be

[0019]

As described above, in the magnetic head core of the present invention, the windings and the windings during the winding work are improved by devising the arrangement or shape of the winding grooves provided in each core half. It is possible to prevent interference with the wire work hook, prevent winding failures and defects, and perform winding with good yield.

[Brief description of drawings]

FIG. 1 is a diagram showing a structure of a magnetic head core according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining the operation of the magnetic head core of FIG.

FIG. 3 is a diagram showing a structure of a magnetic head core of another embodiment of the present invention.

FIG. 4 is a diagram showing a structure of a magnetic head core of still another embodiment of the present invention.

FIG. 5 is a diagram showing a structure of a magnetic head core of still another embodiment of the present invention.

FIG. 6 is a diagram showing the structure of a magnetic head core of still another embodiment of the present invention.

FIG. 7 is a diagram showing a structure of a conventional general magnetic head core.

FIG. 8 is a diagram for explaining a problem of the magnetic head core of FIG. 7.

[Explanation of symbols]

1a, 1b Magnetic head core half 2 adhesive 3 winding window 4a, 4b winding groove 5 Work hook 6a, 6b Winding part of winding

Claims (4)

[Claims] 1. A magnetic head core formed by abutting a pair of core halves made of magnetic material via a magnetic gear, wherein winding grooves provided for each of the pair of core halves are asymmetric with respect to the magnetic gear. The magnetic head core characterized in that 2. A magnetic head core comprising a pair of core halves made of a magnetic material butted against each other via a magnetic gear, wherein the winding grooves provided for each of the pair of core halves have different shapes. Magnetic head core. 3. The winding window is provided on the butting side only on one of the pair of core halves, and the size of the winding groove is smaller on the one side of the core halves. 1 or 2 magnetic head core. 4. The end of the winding groove provided on the one core half on the side opposite to the sliding surface of the recording medium is located at substantially the same position as the end of the winding window on the side opposite to the sliding surface. An end of the winding groove provided on the other core half on the side opposite to the sliding surface is separated from the sliding surface from an end of the winding window on the side opposite to the sliding surface. The magnetic head according to claim 3.